Physical Therapy Assistant Practice Exam 2025 - Free PTA Practice Questions and Study Guide

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What shape should the monofilament deform into when applied correctly during testing?

A straight line

A "C" shape

During monofilament testing, applying the filament correctly should result in it deforming into a "C" shape when pressure is applied against the skin. This deformation indicates that enough force has been applied to cause the monofilament to bend, which is crucial for accurately assessing sensory perception, particularly in patients with potential peripheral nerve damage or conditions like diabetes. The "C" shape formed signifies a successful application of the test, making it clear that the monofilament has made contact with the skin, providing an essential measure of tactile sensitivity.

In contrast, a straight line would indicate insufficient force was applied for effective testing, and shapes such as "Z" or "V" do not reflect the correct technique for this assessment. Understanding this specific response helps in accurately interpreting the results of the monofilament test in a clinical setting.

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A "Z" shape

A "V" shape

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